James k



(No Model.)

J. K. ULLEN.

METAL PLANING MACHINE. No. 344,082. PatentedJu'ne 22, 1886.

W M. Inventor `NiTEn STATES PATENT teren,

JAMEs K. cULLnN, or HAMiL'roN, oHIo, Assienoa To'THn NiLns TooL woaKs, or sAMn rLAon.

METAL-'PLANING MACHINE.

SPBCIFICATION forming part of Letters Patent No. 344,082, ated .Inne 22, 1886.

Application ilcd March '29, 1886.

To all whom, it may coz/Learn: v

Be it known that JAMEs K. CULLEN, of Hamilton, Butler county, Ohio, have invented certain new and useful Improvements in Metal-Planing Machines, of which the following is a specification.

This invention pertains to metal-planing machines, and will be readily understood from the following descriptiomtaken in connection Io with the acconipanying drawngs, in which- Figure l is a side elevation of the important parts of a metal-planing machine emhodying my invention; Fig. 2, a plan of the same; Fig. 3, a Vertical transverse section of the planingmachine through the aXis of one of the driving-shafts and Fig. 4 a face view of one of the driving-gears.

In the drawings, A indicates the usual bed of the machine; B, the reciproeating table; O,

the usual crossshaft, through which the table motion is imparted; D, a driving-gear upon this cross-shaft engaging, in the usual manner, a rack heneath the table; E, a worm-gear fitted upon but not fast to this shaft; F, a casing inclosing this worm-gear; G, the worm'shaft,

through which the worm-gear is actuated; H,

the usual helt-pulleys upon the worm-shaft; J, a driver rigidly secured to the cross-shaft, near the worm-gear; K, a jaw formed upon or secured to the worm-gear and adapted to engage the driver, and therehy revolve the crossshaft as the worm-gear revolves in the direction correspondin g to the eutting-stroke of the table; L, a cushion of leather or other semielastic inaterial-interposed between this jaw and the driver, and forming a buffer between them; M, a second jaw upon the worm-gear, adapted, if unrestrained, to engage the opposite side of the driver,and to rotate the crossio shaft when the worm-gear moves in a direction corresponding to the hacking motion of the table, and N a spring interposed between this second jaw and the driver, such spring being illustrated as a helical spring seated in sockets in the contiguous faces of jaw and driver, the spring forming a huffcr similar in action to the cushion L, but possessin g a greater degree of elasticity or capacity for compression and extension. i

The helts transmit the motion to the table Serial No. 197,085. (No model.)

in the usual manner. Vhen the worin-gearis driven in a direetiou corresponding with the cutting stroke of the table, the driver, and cousequently the eross-shaft, is carried around by the jaw K, the driver being entirely free of contact with the jaw M. At the end of the stroke the belt motion is snddenly reversed in the usual manner, and the worm-gear immediately begins to revolve in the opposite direction, a direction corresponding to the retnrn-stroke of the table, but at a much higher speed than before. In case the jaw M. were in direct contact with the driver it is evident that the table would at once begin its return motion, or that the strains incident to the arresting of its momentum would be at once imposed upon the belt. To arrest the motion of the table in one direotion, and to at once inaugurate a rapid motion in the other direction is incompatible with smooth reversing, and with durahility of helts. In the present device,when the worm-wheel hegins the hacking motion it does not inipose a Sudden check npon the forward motion of the table. On the contrary,the worm-gear,revolvingin its hacking direction, applies its arresting power to the driver gradu'ally through the medium of the spring N, and the elasticity of the spring, continuing to he called upon, finally effects the arrest of the forward motion and a gentle inauguration of the hacking motion of the table, after which the hacking motion takes place at full speed, the spring being at'fii'st under severe compression, the compression lessening when the table-motion reaches the full hacking speed. At the end of the backing stroke the worm-gcar reverses its direction of motion, and the jaw K engages the driver and impels the table upon its cuttingstroke, the wenn-gear and driver moving at differential speeds while the jaw K is approaching the driver. The cushion L serves to deaden the noise of impactive contact between its jaw and the driver, and also perforrns an oflice similar to the spring N, except that its action is restricted by reason of its senii'elasticity. The cushion L, I prefer to form of leather secured either to the face of its jaw or to the face of the driver; hut I have in practice employed a comparatively rigid spiral 'ioo spring for the purpose, the spring being similar in construction to but of greater stiffness than the spring N.

I illustrate the driver as being secured to the cross-shaft in a position to be engaged by the gear which drives that shaft; but it is obvious that the' gear which drives the shaftthat is, the worm-gear in this case-may be fast upon the shaft, the driving-gear D being loose upon the shaft and fitted to be actuated by the driver, and it is obvious that the features may be interposed at most any appropriate point in the driving system of a planing-machine where there are several crossshaftsgeared together as is the common practice.

I claim as my invention- 1. In ametal-planing machine, the combination, with the mechanism by which the belt or belts transmit the reciprocating motion to upon its shaft and provided with jaws, adrivi er secured to such shaft and adapted to be engaged alternately by said jaws,`and buffers interposed between both of said j aws and their respective drivers, substantially as and for the purpose set forth.

3. In a metal-planing machine, the combination,with the mechanism by which the belt or belts impart reciprocating motion to the pianer-table, of a gear in said mechanism ioose upon its shaft and provided with jaws, a driver secured to said shaft and adapted to be engaged alternateiy by said jaws, and bufl`ers of dissimilar elasticity interposed between said jaws and said driver, substantially as and for the purpose set forth.

4. In a metal-planing machine, the combination, With the mechanism by which the belt or ,belts impart the reciprocating motion to the planer-table, of a gear loose upon its shaft and provided With jaws, a driver rigidly secured to said shaft and adapted to be engaged alternately by said jaws, a spring disposed in sockets in the contiguous faces of one of said jawsand the driver, and a cushion of semielastc material, as leather, d isposed between the contiguous faces of the other jaw and said driver, substantially as and for the purpose set forth.

J AMES K. CULLEN.

Witnesses:

J. W. SEE, W. A. SEWARD. 

